Tuttnauer 3850 ELVG-D, Technician Manual

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11 CALIBRATION AND TESTING PROCEDURE
The system is provided with a number of test points for check-up and
adjustment purposes.
For this purpose, the connector JP14 on the AJUNC3 board has to be connected
with the Test board.
The above board is supplied only to service personnel who maintain and
service the autoclaves.
A digital multi-meter with a 1 mV resolution is needed for check - up and
repair.
11.1 Check-Up of Voltages
GND check up - check the voltage between test point TP1 and the body
of the autoclave. If the measured voltage is higher than 30mV, we face a
problem of unsuitable grounding at one of the electronic boards or some
other electronic component (like power supply).
Checking of 12V - connect the negative probe of the multi-meter at TPI
and the positive probe at TP 15, the measured voltage should be 12V.
If voltage is not correct, the fuses on the primary and secondary circuits
have to be checked to see if they are not blown.
Take the connector off the board, and check for a short-circuit on the
board.
Checking of 5V - connect the negative probe of the multi-meter at TP1
and the positive probe at TP17, the measured voltage should be 5V. If
voltage is incorrect the fuses on primary and secondary circuits have to
be checked.
11.2 Calibration Procedure
11.2.1` Calibration MPX 2200
Connect the (negative probe) of the multi-meter at TP1 and
the (positive probe) at TP4 turn POT2, the measured voltage
should be 0.5 V.
11.2.2 Temperature Calibration OF PT-100
1. Connect to JP11 resistor 100
Ω
(2
º
C) and calibrate
between TP25 (negative probe) and TP26 (positive
probe) with POT4 to 5.1m.
2. Connect to JP11 resistor 151.4
Ω
(134
º
C) and calibrate
between TP1(negative probe) and TP7 (positive probe)
with POT5, the measured voltage should be 2.385V.